Research facilities at renowned universities and institutes, such as that conducted at CERN in Geneva, the MPI in Greifswald, JLAB in Newport News, Fermi-Lab near Chicago, MSU in East Lansing, KEK in Tsukuba, ESS in Lund or DESY in Hamburg, require low-temperature cooling that can be delivered by large cryogenic refrigeration units only.
Linde Kryotechnik develops and builds refrigeration systems to fit customers’ requirements. Efficiency, punctuality, and reliability are our watchwords. Our credentials are represented by special helium refrigeration systems with a performance rating that ranges from several hundred to well over 18,000 W at a mean temperature of 4.5 K, with an open-ended upper limit.
Other special refrigerators work with cold compressors, warm screw compressors, vacuum pumps, or a combination of these, and deliver cooling power at temperatures down to and below 1.5 K.
Through its projects in the USA and worldwide, Linde Kryotechnik has accumulated a rich fund of experience in cooling high-temperature superconductors (HTS) in the 30 to 80 K range, as well as refrigeration of cold neutron sources or cryo pumps for space simulation chambers in the 20 K temperature range.
The thermodynamic process in a refrigeration system is similar to that in a liquefier, which is why the system uses the same components.
The main components of a helium refrigerator are:
- oil-injection screw compressors and oil removal systems
- vacuum-insulated cold box
- aluminium-plate heat exchanger
- TED expansion turbines with dynamic gas bearings
- control system
Further system components such as:
- transfer lines
- valve boxes
- distribution systems
are designed, supplied, and installed by Linde Kryotechnik.